To find load regulation characteristics of Zener voltage regulator Apparatus: S.no Apparatus Range Quantity 1 Zener diode 1 2 Resistance 470-ohm 1 3 Regulated power supply 0-30V 1 4 Ammeter 0-100 mA 1 5 Voltmeter 0-10 V 1 6 Breadboard and wires 7 Variable resistor ( 100-1100-ohm) Introduction: An ideal P-N Junction diode does not conduct in reverse biased condition. Zener diode regulator breadboard circuit. To Study the V-I characteristics of Forwa rd Biased PN junction diode. To Study the working of a diode as half w ave rectifier with and without filter. You will need to wire this on your breadboard. Zener Diode Characteristics. Preface: ... Another use of diodes, especially zener diodes, is as a limiter. To Study the working of a diode as Bri dge rectifier with and without filter. Hence in this way the voltage is limited across the load. This article will help to explain the characteristics which make up zener diodes, specifically how the voltage across a zener diode varies with the current flowing through it. While doing the experiment do not exceed the readings of the diode. To get breakdown voltage sharp and distinct doping is controlled and the surface … EXPERIMENT NUMBER 4 Examining the Characteristics of Diodes . 1-3 2. By connecting the negative terminal of the battery to the diode anode terminal, zener diode starts operating in the reverse bias or breakdown mode. The lead connected to the p-type material is called the anode and the lead connected to the n-type material is the cathode. Zener Diode Definition Vi Characteristics And Breakdown. In this way, it is used as a voltage regulator. When forward biased voltage is applied to the zener diode, it works like a normal diode. This experiment is composed into 2 objectives. Understand Zener Diode Datasheet Specifications. The above diagram shows the V-I characteristics of the Zener diode. Pn Junction Diode Characteristics Experiment Using Breadboard March 30, 2019 Get link; Facebook; Twitter; Pinterest; Email We can add an external negative voltage source to combine with the positive internal voltage to produce a total voltage high enough for this experiment. • To study the concept of designing a Zener Voltage Regulator. Build the circuit shown in Figure 1 on your solderless breadboard using the 1N4735 6.2 V Zener diode. • To measure the important parameters of Zener Voltage Regulator. II. base unit, oscilloscope and a dc supply we can demonstrate the characteristics of the zener and its application for voltage regulation. The break down voltage Vz is obtained from the graph as shown below. Make sure that the thermocouple is in the vicinity of the diode. Use AWG1 (5 V constant) and the –5 V Vn user supply to establish the dc supply V IN. We are going to take Zener I-V Characteristics Curve experiment as an example to understand how we can perform a general experiment using the PSLab device. With these, the group was able to observe how a Zener Diode acts like a rectifier diode when it is forward bias and a voltage regulator when it is in reverse bias. First, we will look at the general laboratory experiment and it’s format. The typical forward voltage at room temperature with a current of around 1 mA is around 0.6 volts. Objectives: • To study the I-V characteristics of a Zener diode. Materials and Equipments: 1 Industrial Electronics Trainer III. A Zener diode is a diode which allows current to flow in the forward direction in the same manner as an ideal diode, but will also permit it to flow in the reverse direction when the voltage is above a certain value known as the breakdown voltage 10-1 2 Result: Volt-Ampere Characteristics of P-N Diode are studied. INTERPRETATION OF RESULTS This experiment demonstrates the characteristics of a zener diode. For V s between 0 to 20V, obtain values for I z and V z. # Characteristics of a Zener Diode The above diagram shows the V-I characteristics of the Zener diode behavior. What Is A Zener Diode Definition Construction Working. David Jones made a tutorial on the fundamentals of zener diodes over his EEVblog youtube channel. 4.1). They provide a low-cost and no frill method for voltage regulation. On the first objective of the experiment, the group demonstrated the dc characteristics of the Zener Diode with the use of a breadboard. 4 I. Then we will see how that experiment can be performed using the PSLab Android App and the PSLab Hardware Device. The experiment is continued till the milliammeter shows a large deflection while the voltmeter reading remains a constant, indicating the break down voltage. Laboratory Exercise 2 Diode Characteristics PURPOSE The purpose of this experiment is to acquaint you with the operation of diodes. 3.1 Diode Characteristics Small-Signal Diodes Diode: a semiconductor device, which conduct the current in one direction only. The ADALM1000 hardware can only produce (and measure) voltages up to the 5 V maximum. What we are trying to achieve in this experiment is to demonstrate that a diode exhibits a behaviour as described by Figure 4. Using both charts, plot the complete IV terminal characteristics for the Zener diode. Experiments: Silicon, Zener, LED Diode Characteristics; Common Base NPN and PNP Transistor Characteristics Experiment 4 Characteristics of a Silicon Diode and the Zener Diode Introduction The diode is a device formed from a junction of n-type and p-type semiconductor material. 3. #24 wire ... You will mostly use electrolytic and ceramic capacitors for your experiments. Zener diode is connected in reverse bias, so once the Zener voltage exceeds then the current flows through the diode but there is an unnoticeable voltage drop. Two terminals: anode and cathode. Use various fixed and variable resistors for R L. Figure 1. Sl No Name of Experiment Page No 1. Zener Diode Characteristics - Zener regulator Prelab: You are tasked to determine experimentally the characteristic curve of a reverse-biased Zener diode. Zener diode is nothing but a single diode connected in a reverse bias mode and Zener diode can be connected in reverse bias positive in a circuit as shown as picture.we can connect it for different applications. Chapter 2 Zener Diode Zener Diodes The Breakdown. To plot Volt-Ampere characteristics of Zener diode. When the reverse bias voltage is greater than a predetermined voltage then the Zener breakdown voltage occurs. Do not switch ON the power supply unless you have checked the circuit connections as per the circuit diagram. Electronic & semiconductor devices Page 5 of 7 INTERNATIONAL UNIVERSITY SCHOOL OF ELECTRONICS & TELECOMMUNICATIONS ENGINEERING (EE) 1. We use Zener diodes for voltage regulation and voltage stabilisation. The I-V Characteristics Curve of a zener diode, shown below, is the curve which shows the current-voltage relationship of a zener diode. Here we go with the Zener Diode Characteristics Experiment Using Multisim Software Plot the reverse characteristic curve by taking reverse voltage along –ve X-axis and reverse current along –ve Y-axis. However, when reverse biased voltage is applied to the zener diode, it works in different manner. In general, the cathode of a diode is marked by a solid line on the diode (Fig. Connect voltmeter and ammeter in correct polarities as shown in the circuit diagram. 7-9 4. When the positive polarity is at the anode – the diode is forward biased and is conducting. (Note: All or any pre-lab works must be completed before coming to the lab and must be handed-in to the lab instructor during entering the lab and at the beginning of lab session) Procedure Zener diode I-V characteristics 1. Electrolytic capacitors An electrolytic capacitor is a type of capacitor that uses an electrolyte, an ionic conducting liquid, as one of its plates, to achieve a larger capacitance per unit volume than other types. When the diode is connected in forward bias diode acts as a normal diode. The forward bias region of a Zener diode is identical to that of a regular diode. When the positive polarity is at the cathode – the diode is reversed biased and is not conducting. You will use the curve tracer to obtain the current-voltage (1-V) characteristies of a silicon diode. characteristic graph of the zener diode used in this experiment. Figure 4 shows a case in which reverse-bias breakdown of zener diodes limit the voltage swing across the load resistor. To find Zener break down voltage in reverse biased condition. You must also design a circuit that demonstrates the operation of a 7 V ± 5% loaded Zener regulator powered by a 12 V DC voltage source. David started the tutorial comparing between zener and regular diode. The characteristics of these references make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. This is considered as the basic application of Zener diode. To measure the reverse breakdown voltage of your Zener diode we need to produce a voltage difference larger than the breakdown voltage of the 6.2 V 1N4735 diode. Figure 2. Conventional Zener Diode With Rz 30 W Shows A 1st I V. Why … Connect the circuit in Figure 1.2. For convenience it is used normally. By using a breadboard, Zener diode, a diode, resistors, a digital multimeter, F.A.C.E.T. The setup we are using for this experiment. Procedure: Step 1. C. Half Wave Rectifier Build the rectifier circuit shown in Figure 4. The critical parameter of this type of diodes is the Zener breakdown voltage. Circuit Diagram: Figure 1 Zener Regulator The unit is supplied with a breadboard to help students experiment with test circuity using various components without having to solder. Experiment No: 2 ZENER DIODE CHARACTERISTICS AIM: 1. In the reverse bias condition the Zener diode is an open circuit and only a small leakage current is flowing as shown on the exaggerated plot. A number of ready to use experiment circuit boards are provided. What Is Zener Diode Operation Principle Types Uses Of . 2. A single zener diode would limit the swing in one direction only. Zener diode regulator. Zener Diode characteristics: VI characteristics of Zener Diode. The VI characteristics of a zener diode is shown in the below figure. 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